package com.lagou.dao.impl;

import com.lagou.dao.CourseContentDao;
import com.lagou.pojo.Course;
import com.lagou.pojo.Course_Lesson;
import com.lagou.pojo.Course_Section;
import com.lagou.utils.DateUtils;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.List;

public class CourseContentDaoImpl implements CourseContentDao {
    @Override
    public List<Course_Section> findSectionAndLessonByCourseId(int courseId) {
        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            //2.编写SQL
            String sql = "SELECT \n"
                    + "id,\n"
                    + "course_id,\n"
                    + "section_name,\n"
                    + "description,\n"
                    + "order_num,\n"
                    + "STATUS\n"
                    + "FROM course_section WHERE course_id = ?";
            //3.执行查询
            List<Course_Section> sectionList = qr.query(sql, new BeanListHandler<Course_Section>(Course_Section.class), courseId);

            //4.根据章节ID查询课时信息
            for (Course_Section section : sectionList) { //调用方法 获取章节对应的课时
                List<Course_Lesson> lessonList = findLessonBySectionId(section.getId());
                //将课时数据封装到 章节对象中

                section.setLessonList(lessonList);
            }
            return sectionList;

        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }


    }

    @Override
    public List<Course_Lesson> findLessonBySectionId(int sectionId) {

        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            String sql = "SELECT \n"
                    + "id,\n"
                    + "course_id,\n"
                    + "section_id,\n"
                    + "theme,\n"
                    + "duration,\n"
                    + "is_free,\n"
                    + "order_num,\n"
                    + "STATUS\n"
                    + "FROM course_lesson WHERE section_id = ?";
            List<Course_Lesson> lessonList = qr.query(sql, new BeanListHandler<Course_Lesson>(Course_Lesson.class), sectionId);
            return lessonList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }


    }

    @Override
    public Course findCourseByCourseId(int courseId) {

        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            // 2.编写SQL
            String sql = "SELECT id,course_name FROM course WHERE id = ?";
            // 3.执行查询
            Course course = qr.query(sql, new BeanHandler<Course>(Course.class), courseId);
            // 4.返回结果
            return course;

        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    @Override
    public int saveSection(Course_Section section) {

        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            //2.编写SQL
            String sql = "INSERT INTO course_section(course_id,section_name,description,order_num,STATUS,create_time,update_time)VALUES(?,?,?,?,?,?,?);";
            //3.准备参数
            Object[] param = {section.getCourse_id(), section.getSection_name(), section.getDescription(), section.getOrder_num(), section.getStatus(), section.getCreate_time(), section.getUpdate_time()};
            //4.执行插入
            int i = qr.update(sql, param);
            //4.返回结果
            return i;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    @Override
    public int updateSection(Course_Section section) {

        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            //2.编写SQL
            String sql = "UPDATE course_section SET\n"
                    + "section_name = ?,\n"
                    + "description = ?,\n"
                    + "order_num = ?,\n"
                    + "update_time = ? WHERE id = ?;";
            //3.准备参数
            Object[] param = {section.getSection_name(), section.getDescription(), section.getOrder_num(), section.getUpdate_time(), section.getId()};
            //4.执行修改操作
            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    @Override
    public int updateSectionStatus(int id, int status) {
        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            //2.编写SQL
            String sql = "UPDATE course_section SET STATUS = ?,update_time = ? WHERE id = ?;";
            //3.准备参数
            Object[] param = {status, DateUtils.getDateFormart(), id};
            //4.执行修改操作
            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    @Override
    public int saveLesson(Course_Lesson lesson) {
        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            //2.编写SQL
            String sql = "INSERT INTO course_lesson(\n" +
                    "course_id,\n" +
                    "section_id,\n" +
                    "theme,\n" +
                    "duration,\n" +
                    "is_free,\n" +
                    "`status`,\n" +
                    "order_num,\n" +
                    "create_time,\n" +
                    "update_time)VALUES(?,?,?,?,?,?,?,?,?);";
            //3.准备参数
            Object[] param = {lesson.getCourse_id(), lesson.getSection_id(), lesson.getTheme(), lesson.getDuration(),
                    lesson.getIs_free(), lesson.getStatus(), lesson.getOrderNum(), lesson.getCreate_time(), lesson.getUpdate_time()};
            //4.执行插入
            int i = qr.update(sql, param);
            //4.返回结果
            return i;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    @Override
    public int updateLesson(Course_Lesson lesson) {
        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            //2.编写SQL
            String sql = "UPDATE course_lesson SET course_id = ?,section_id = ?,theme = ?,duration = ?,is_free = ?,order_num= ?,update_time = ? WHERE id = ?;";
            //3.准备参数
            Object[] param = {lesson.getCourse_id(),lesson.getSection_id(),lesson.getTheme(),lesson.getDuration(),lesson.getIs_free(),lesson.getOrderNum(), DateUtils.getDateFormart(), lesson.getId()};
            //4.执行修改操作
            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }
}

